one. both would be attractive as hell together. they're both about the same height (either going by 177-178 cm. myungsoo is not 180 cm like some sites say, so essentially they are the same height.), they both have cute smiles and dimples, and they both are really, really cute (even though, myungsoo can finally use his face sometimes now and look really hot. but then again, yixing with those wife beaters of his can look really good too. so hotness meter between the two is about the same, so no outshining each other or anything like that.)  (and two words: clothes sharing.)

two. they are both clingy/touchy-feely type people. myungsoo clings, clings, clings, while yixing has the habit of putting his arms around people (especially those that are smaller or the same size as him) or trying to get as close as possible to them as well. so if they were together, they would be super touchy feely and knowing myungsoo who i'm sure has to hold back a lot when it comes to the other boys in infinite probably wouldn't have to do so as much with yixing. seriously, i can just see the two snuggling with each other for hours and both being okay with it. plus, i don't think yixing would mind myungsoo's slight hair touching/smelling he has either. 

three. they both have similar interests. they both play the guitar, they both write music (myungsoo has one written song that was actually pretty good and based off some of the entries he had in his photobooks, he knows how to write, while yixing's been composing stuff for a while and just recently had something show up in the sm rookies campaign thing they're doing), they both like to sleep, both have questionable fashion choices sometimes (myungsoo with his plaid and black and yixing with his old grandma fashions he likes to wear sometimes), likes to eat (i am more than positive that myungsoo would show yixing his love for all things udon and kimchi jjigae, while yixing can show him all the wonders of chinese cuisine, both would probably really like this), etc... 

four. they are also different enough that they aren't entirely twins in the personality department like myungsoo's love for photography and yixing's love for dance. but i think they could make it work.

five. soccer/baseball/basketball game dates. i know myungsoo likes his sports and yixing's pretty sporty himself, so i can totally see the two getting along well when it comes to going to see sports and have little dates. plus, i think they would be the type to have a beer or two, some game food, and just be into the games they watch, occasionally holding hands and stealing a kiss or two. 

six. both are about the same level when it comes to their smarts, with yixing being one to one up myungsoo occasionally with his sarcastic wit. i don't see either of them being too smart for the other, and i think neither would feel as if they're too smart for the other either. 

seven. both are sweethearts. (if myungsoo can constantly cry whenever infinite wins awards or when anything bad happens to the others in infinite or the people he cares about, that's pretty telling of how much of a softy he is. besides his slightly 'i don't want a girlfriend of mine wearing a short skirt outside the house' ways (a thinking that's entirely acceptable in korea and other areas in society, i can't really fault him for this either, and based on his past, he's not very good with girls anyway.), he's awkward and too trusting and obviously needs someone that can take care of him from time to time, as well as, let him do some taking care too. yixing could easily do that. but besides that, myungsoo's a total mama's boy and he's usually a sweet guy towards everyone (especially those that really need it.)) (and yixing is just usually sweet in general, and we all know him to be a wonderful unicorn and he's one that doesn't do anything too terrible or really notable that make him seem worse than he actually is. i think he would treat whoever he was with right and do a good job of being there for them and also being able to take care of them as well.)

eight. yixing is more experienced than myungsoo when it comes to dating, and myungsoo needs someone to guide him just a bit, and yixing would be a good choice for him. 

nine. minseok and dongwoo are friends. (minseok gets along with quite a few members of infinite as well.) they can easily schedule exo-m/infinite dates. (i say m instead of all of exo because that's a bit too much, and seriously, i just want to see jongdae/sunggyu interactions too.)

ten. myungsoo is a romantic and yixing is like a prince. myungsoo loves shojo manga and he has a soft spot for romance movies and he just readily believes everyone to be good, so he's kind of like a disney princess, while yixing's really sweet, humble, good looking, and is kind of perfect boyfriend material, hence, he can be myungsoo's prince. they would easily do adorable, romantic cuteness stuff and people would literally puke up rainbows because of it.

eleven. they both look good in sweaters. (can you just see them in their cute little sweaters, doing winter stuff and having fun and just being adorable together like freaking sharing a scarf together.) 

twelve. they are both kind of weird too. like i can totally see myungsoo making his damn origami birds and crap and then yixing coming up to him and trying to make some too and myungsoo would just smile at him and yixing would smile back and it would be so cute. and both infinite and exo would just be like 'these fools are crazy, let's just leave them here' and go off to do something fun, only to comeback and see them still making origami crap and being super close together, like thighs touching close together, as they speak to each other and maybe yixing explaining some chinese to myungsoo and myungsoo just calmly fixing/helping out yixing's korean. and it would be so beautiful.

thirteen. i think they could easily become acting buddies. myungsoo shows interest (lots of it) and i don't think yixing's opposed to the idea of acting, so i think they could easily become acting buddies. (and can you just see these too watching their dramas, only to text/call later and  be like 'good job babe.' yeah, that would be awesome.)

fourteen. makeouts. that's all i can say.